Please do not stop offering these educational classes. In today’s society, we lack of having the understanding on how things work in the engine and its effects. As the saying goes. Knowledge is power. May God bless you AMED and continue educating us to strengthen our abilities to move forward in learning within the automotive technology.
Hello, I have been a technician for more than 40 years. I come from the days of carburetors. You have explained everything very well how it works. Let's get started and learn how these new systems work, thank you
Man I remember when all the manufacturers were SO proud of electronic fuel injection that most all of them had a huge ‘EFI’ decal on both doors, the rear, and sometimes on the hood lol was such a great evolution in vehicles. No more rebuilding carbs, replacing jets and floats etc etc and no more pulling out a choke before you start the car. Especially in cold environments in winter, good luck lol and then have to warm the car up in the driveway while you scrape the ice and snow off the windshields. Good times good times lol appreciate ya brother! Great content as always! Soli Deo Gloria~
I went to trade school years ago to become an automotive service technician (mechanic), and although the technology has changed a lot, I picked out some terminology that was familiar and the basic idea remains the same. Good job on the refresher course Ahmed!
I was raised during the era of Rochester 2 barrel, Holley 3 and 4 barrel carbs. Always fun to clean, tweak or refurbish them. I later had a '74 Porsche 914 with Bosch fuel injection. I drove it cross country in the summer and had 5 or 6 unscheduled stops through California, Arizona and New Mexico due to vapor lock. I eventually replaced it with Weber carbs and it ran great after that. That particular year fuel injection had lots of problems. Looking forward to Part Deux.
55 or so years ago I was taught the piston goes down on it's induction stroke, and then the atmosphere PUSHES the air in. As nature abhors a vacuum. Just being picky I have worked on 4 cylinder cars that had 4 individual carbs. Great fun to balance. While I had an air flow meter I tended to use a length of 3/4 diameter pipe. None the less, I do enjoy your explanations.
Put your finger over the spark plug hole (with the spark plug removed) & your will feel the vacuum. It's the other half of the equation. Theoretically is the air being drawn by the vacuum or pushed in by atmospheric pressure or a combination of both? Either way it works.
I love these kinds of videos. Learning about the history of tech is always fun. I loved the simplicity of these engine systems. I realized they monitor my engine thru out its duty cycles. But I didn't know what the numbers meant until now. Thank you for sharing. 🎉🎉🎉
I'm coming from early 80' manual, mechanical injection system school but after 50' carburettor injection and found that easy to understand on how injection system works👍Many thx for that knowledge lesson 👍
Thank you. Seldom if ever do I watch a presentation to the very end. Yours, however. I always watch to the very end. My the Lord bless you and keep you as well.
Always interesting topics, i grew up with Carburetors in all my dad's cars and my 1st car . I remember adjusting the air fuel ratio by adjusting the air and fuel screws. My sister had an old VW rabbit that had mechanical Bosch fuel injection worked well and was reliable.
All the way form South Africa! Thank you for your dedication, experience and quality videos!! May God bless you and your loved ones every day until He returns.
Fantastic video! This is the best explanation of the details of fuel injection -- with the why and how behind it -- that I have ever heard! Keep up the good work! I'm looking forward to Part 2!
Another fantastic video from one of the greatest. He's so easy to understand. Let's all be thankful AMD spends the time to help educate people. He would be a great instructor in any automotive course however this platform gets it out there to so many more people. For that I thank you. Keep it up AMD and TCCN team!
I don't miss carburetors AT ALL. The worst thing was automatic chokes. If I still owned a muscle car, I'd convert to fuel injection. Great video, as usual.👍🇺🇸✊️
As always AMD, your presentation skills are flawless. When you decide to “scale down “ from running your shop, your teaching skills will be incredibly valuable. God’s blessings on you, your family and your business. Stay safe 🙏❤️👍
I would love to see a video on the engines that have both direct and port injection, like the 2GR-FKS in the ES 350, getting into the details of how the computer decides which injection type to use at what time, and when the engine is most likely to be using one type of injection over the other
Carburators are not that archaic (as a tech), it's a simple and relatively effective system. It was environmental regulations, and cost of oil, and aerospace needs (high altitude and acrobatic flight, plus space travel), that drove much of the advancements in fuel injection tech (which is a great idea). That said, like many techs, fuel injection was in use in aerospace since 1916, and eventually trickled down to other uses, such as in automotive! 😁 By the by, many of the GA planes I still fly today are carbureted. 😉 This is an Excellent explanation in laymen terms! A fantastic job! Thanks for creating this educational material!👏
@8:15 Always impressed with your electronics knowledge AMD. What is likely happening is back on the ECU, you have a transistor for each injector. With the emitter of the transistor tied to ground and the collector tied to the ground wire of the injector. When the ECU wants one of those injectors to open (spray fuel), a current is applied to the base of that transistor which turns it on, thus completing the circuit allowing 12V to be applied to the coil of the injector solenoid.
Love your videos; in early port injection systems the injectors all fired together. Which meant most of the time it was not when the intake valve was open. What you're actually describing now is called sequential fuel injection because, well, each injector fires sequentially
AMD, I remember the panic that swept the world in the 80s when fuel injection began its widespread replacement of carburetors. All these years later, it appears we survived.😉 Of course, there are still some people who object to the fact our personal transportation is no longer powered by oats. 🐴
WONDERFUL, this is exactly what I was waiting for!!! Can't wait for part two. Thanks for explaining mechanical topics like these. I'm starting to understand why nobody wants to replace only my post catalytic converter 02 sensor and why I get repeating check engine lights. Maybe my CC is bad? (2012 Subaru Outback)
Probably the most interesting (yet simple) Cars, Engines I’ve owned was the 2010 Mazda RX8. These Rotary Engines are a prime example of if you maintain it and drive it correctly (city driving is really bad for them) they will last.
My ‘83 Trans Am had a four barrel carb. Yes you did do one, maybe two pumps but it fired up the engine instantly. Fuel economy was good and drivability was decent. I think that fuel injection was really for pollution control objectives and increased hp output. My car got 30 mpg and now 40 years later, I’m still getting 30 mpg on my newer fuel injected vehicles.
Outstanding video. I remember some of the first FI systems were speed density, like on the 1987 Mustangs and the Honda PGM Fi systems that made their way to motorcycles. I thought that they were really good systems. As I remember they were smooth, reliable, and had about half the sensors as we have on todays EFI. 😁
I met Stuart Hilborn, one of the first men to put fuel injection on a race car shortly before he passed away. He was also one of the dry lakes hot rodders before WWII.
Great education right here folks. Well spoken in layman's terms. I started driving in the 80s, mostly cars from the 60s and 70s of many makes. They were so much easier to fix back then that nearly anyone could diy repairs, so long as you understood the simple concept. Air, fuel, spark. Air and fuel were controlled by the carb. Spark controlled by distributor and coil. This was so simple our fathers taught us and it was a high school subject. 3 or 4 kids would bring an old car to school and spend the next 3 months fixing it. I find it unfortunate how modern engines are so complicated we need a technician to fix it. Old school we could listen to it, feel it, smell it. This is replaced with sensors and a computer and an idiot check engine light. Now go see the technician or get your own expensive code reader or scanner to tell you the problem, just to find a failed sensor. But the failed sensor is causing chaos in efficiency and will kill an engine.
I enjoyed your video and simple explanation on this complicated technology. I recently replaced an oxygen sensor on my 96 4Runner (original owner). Good to know how that works in the system.
GJ! Pls consider reviewing the Mitsubishi Outlander PHEV and the Nissan Sentra or the Kicks Plus a car with a Chinese platform like Volvo or Lotus Also a Porche and a Ferrari if possible 🤍 Appreciated!
I'm sorry to have to correct you. In the UK you never needed to pump the throttle for a cold start. On Weber or SU carburettors you pulled out the choke knob and turned the key. If you had an automatic choke you just turn the key. At 70 years off age i can still remember it like it was yesterday. There was a small pump on the side of Weber carburettors that was solely there to increase power as you pushed down on the throttle slowly and smoothly. All the above is provided the engine was well maintained and serviced. Checking the points angle and gap etc.
I can't wait for part 2, because I have a 2024 rav4 that loses power when accelerating from a stop, so I want to see if anything in the vids could be the problem
English is not my native language. This explanation is excellent, it is clear even without needing to see any visualisation. One interesting question, if computer cannot control the amount of air, and there is a best amount of gasoline (to keep ratio) then how can we accelerate? Increase gasoline amount? But ratio will not be optimal
The accelerator pump in a carburetor was not only to help it start, more importantly it made the mixture richer momentarily when you pressed the accelerator to take up the lag that occurs in the venturi process.
My favorite comparison of carbs to injection is my old motorcycle and its 'upgrade.' My 4 cylinder 4 carbs 600cc bike gets 55mpg (up ~60-65 on hwy). Its upgrade to fuel injection got 40mpg. But hey, at least we can program sport and rain throttle modes! It's spiritual successor today is now 900cc, and gets 50mpg for nearly triple the price. But hey, at least it has an infotainment screen and cruise control! Bring back my analogue tech, sheesh.
Fuel injection system was initially design for air plane, the first mechanical fuel injection design by Bosch(Jetronic) that applied to Mercedes, Porsche and Volkswagen is using trigger cartridge on the lower part of ignition distributor shaft, about 20 year later (1988)GM create TBI and CFI by Ford. Toyota start using TCCS - Toyota Computer Control System - in 1983 which is for the older tech that time, TCCS means Totally Confusing Control System.
I'm fascinated with how cars have evolved over the years, and personally prefer modern cars for their advances in technology/emissions. Unfortunately there's a loud percentage of car enthusiasts who think computers in cars are the devil.
The only thing I would have liked is if you added a basic timeline of when these technological changes were happening. I know the intent was to keep things as simple as possible but as educational as it is, it would be very helpful to know the years we were in while these advances were taking place.
This is great I was hoping someone like the car care nut help explain this to people I love the Scotty Kilmer‘s of RU-vid, but there’s just something that Mr. car care nut Explains things with more of an art and passion just today driving my ISF I was thinking I should really relearn how D4S works in this car does the multi port only work under light throttle applications? When does the direct injection injectors kick in? Only in heavy load? ECT…
Thanks Ahmed this was really good info and has put me right on that fuel/air mixture ratio because when I was younger (much younger) I used to tweak around carbie engines and always thought that the ratio was 16/17:1 how wrong was I ?? I am looking forward to part 2 as I now drive a 2011 Mazda 6 Sports Hatchback and would like to know just how my (I think) multi port system works notthat these days I can tweak around cars because of the far more complicated fuel and other computer-controlled systems.
forgot to mention how the injection pressure is regulated, basically to prevent the fuel pump from locking up and burning up, a pressure relief valve is on the fuel rail, and will "dump" the fuel when the pressure builds up and sends it back to the tank. Say the engine is just idling at a stop, most likely the fuel is just circulating from tank, to engine, back to tank. This also helps purge air out of the fuel system as well!
AMD thanks for your very informative video do you go to continuing education classes every year to keep up on all continuing changes in the automotive industry and if you do how long do they last you are just like a old farmer outstanding in your field keep making your videos and I will keep watching
Carburator.. no fuel pump if tank above engine (motorcycle), if pump required a low pressure one (cheap, reliable, easy to replace), no computer, no sensors. You can adjust with a single screw driver, disassemble with one wrench, diagnose by ear. There is a lot to like about them. I am personally replacing my car with one that is carburated.
Oh wow, where were you two days ago when I was looking into this very topic. My 15 1/2 yr old car went to the dump last year. I thought bc it lasted so long and the engine was still working perfectly, that I should try to find a car with the similar attributes. I found the 2021 Honda HR-V 1.8L 4 cylinder SUV.( my car was a 2.0L) The Honda was naturally aspirated (like mine) , meaning no super charging which is hard on an engine. It is an interference engine like mine ( it is what it is ) and it has a timing CHAIN like mine. It also has an SMPFI ( like mine)which is a sequential multi-port fuel injector and NOT a direct injector which is harder on the engine. My engine was a DOHC and the Honda is an SOHC but I don't know what effect that will have. I don't imagine it will be a big deal. I am good to my cars. I don't drive like a crazy person who is always in a hurry and driving the car into the ground. I am fastidious about maintenance especially oil changes and spark plug changes. I can hardly wait for PART 2 . Thank you Ahmed. 🔷 : ) P.S., Sorry I forgot to mention my car was a 2009 Dodge Caliber SXT 2.oL 4 cylinder.
good vid! one thing I've wondered but have not seen an explanation--if your car recommends (but does not require) 91 octane but you put in 87 octane, how does it adjust for that?
